<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>3D导航</title>
    <style>
      ul {
        margin: 0;
        padding: 0;
        list-style: none;
      }

      .nav {
        width: 300px;
        height: 40px;
        margin: 50px auto;
      }

      .nav ul {
        display: flex;
      }

      .nav li {
        position: relative;
        width: 100px;
        height: 40px;
        line-height: 40px;
        transition: all 0.5s;
        background-color: pink;
        transform-style: preserve-3d;

        /* 为了看到橙色和绿色的移动过程，给立方体添加旋转 */
        transform: rotateX(-20deg) rotateY(60deg);
      }

      .nav li a {
        position: absolute;
        left: 0;
        top: 0;
        display: block;
        width: 100%;
        height: 100%;
        text-align: center;
        text-decoration: none;
        color: #fff;
      }

      /* 立方体每个面都有独立的坐标轴，互不影响 */
      .nav li a:first-child {
        background-color: green;
        transform: translateZ(40px);
      }

      .nav li a:last-child {
        background-color: orange;
        /* translateY(-20px) */
        transform: rotateX(90deg) translateZ(20px)  ;
      }

      .nav li:hover {
        transform: rotateX(-90deg);
      }
    </style>
  </head>

  <body>
    <div class="nav">
      <ul>
        <li>
          <a href="#">首页</a>
          <a href="#">Index</a>
        </li>
        <li>
          <a href="#">登录</a>
          <a href="#">Login</a>
        </li>
        <li>
          <a href="#">注册</a>
          <a href="#">Register</a>
        </li>
      </ul>
    </div>
  </body>
</html>
